1 files changed, 156 insertions, 0 deletions
diff --git a/cpu/arm926ejs/davinci/dp83848.c b/cpu/arm926ejs/davinci/dp83848.c
new file mode 100644
index 0000000000..5719845b34
--- /dev/null
+++ b/cpu/arm926ejs/davinci/dp83848.c
@@ -0,0 +1,156 @@
+/*
+ * National Semiconductor DP83848 PHY Driver for TI DaVinci
+ * (TMS320DM644x) based boards.
+ *
+ * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
+ *
+ * --------------------------------------------------------
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <net.h>
+#include <dp83848.h>
+#include <asm/arch/emac_defs.h>
+
+#ifdef CONFIG_DRIVER_TI_EMAC
+
+#ifdef CONFIG_CMD_NET
+
+int dp83848_is_phy_connected(int phy_addr)
+{
+	u_int16_t	id1, id2;
+
+	if (!dm644x_eth_phy_read(phy_addr, DP83848_PHYID1_REG, &id1))
+		return(0);
+	if (!dm644x_eth_phy_read(phy_addr, DP83848_PHYID2_REG, &id2))
+		return(0);
+
+	if ((id1 == DP83848_PHYID1_OUI) && (id2 == DP83848_PHYID2_OUI))
+		return(1);
+
+	return(0);
+}
+
+int dp83848_get_link_speed(int phy_addr)
+{
+	u_int16_t		tmp;
+	volatile emac_regs*	emac = (emac_regs *)EMAC_BASE_ADDR;
+
+	if (!dm644x_eth_phy_read(phy_addr, DP83848_STAT_REG, &tmp))
+		return(0);
+
+	if (!(tmp & DP83848_LINK_STATUS))	/* link up? */
+		return(0);
+
+	if (!dm644x_eth_phy_read(phy_addr, DP83848_PHY_STAT_REG, &tmp))
+		return(0);
+
+	/* Speed doesn't matter, there is no setting for it in EMAC... */
+	if (tmp & DP83848_SPEED) {
+		if (tmp & DP83848_DUPLEX) {
+			/* set DM644x EMAC for Full Duplex  */
+			emac->MACCONTROL = EMAC_MACCONTROL_MIIEN_ENABLE | EMAC_MACCONTROL_FULLDUPLEX_ENABLE;
+		} else {
+			/*set DM644x EMAC for Half Duplex  */
+			emac->MACCONTROL = EMAC_MACCONTROL_MIIEN_ENABLE;
+		}
+
+		return(1);
+	} else {
+		if (tmp & DP83848_DUPLEX) {
+			/* set DM644x EMAC for Full Duplex  */
+			emac->MACCONTROL = EMAC_MACCONTROL_MIIEN_ENABLE | EMAC_MACCONTROL_FULLDUPLEX_ENABLE;
+		} else {
+			/*set DM644x EMAC for Half Duplex  */
+			emac->MACCONTROL = EMAC_MACCONTROL_MIIEN_ENABLE;
+		}
+
+		return(1);
+	}
+
+	return(0);
+}
+
+
+int dp83848_init_phy(int phy_addr)
+{
+	int	ret = 1;
+
+	if (!dp83848_get_link_speed(phy_addr)) {
+		/* Try another time */
+		udelay(100000);
+		ret = dp83848_get_link_speed(phy_addr);
+	}
+
+	/* Disable PHY Interrupts */
+	dm644x_eth_phy_write(phy_addr, DP83848_PHY_INTR_CTRL_REG, 0);
+
+	return(ret);
+}
+
+
+int dp83848_auto_negotiate(int phy_addr)
+{
+	u_int16_t	tmp;
+
+
+	if (!dm644x_eth_phy_read(phy_addr, DP83848_CTL_REG, &tmp))
+		return(0);
+
+	/* Restart Auto_negotiation  */
+	tmp &= ~DP83848_AUTONEG;	/* remove autonegotiation enable */
+	tmp |= DP83848_ISOLATE;		/* Electrically isolate PHY */
+	dm644x_eth_phy_write(phy_addr, DP83848_CTL_REG, tmp);
+
+	/* Set the Auto_negotiation Advertisement Register
+	 * MII advertising for Next page, 100BaseTxFD and HD,
+	 * 10BaseTFD and HD, IEEE 802.3
+	 */
+	tmp = DP83848_NP | DP83848_TX_FDX | DP83848_TX_HDX |
+	 	DP83848_10_FDX | DP83848_10_HDX | DP83848_AN_IEEE_802_3;
+	dm644x_eth_phy_write(phy_addr, DP83848_ANA_REG, tmp);
+
+
+	/* Read Control Register */
+	if (!dm644x_eth_phy_read(phy_addr, DP83848_CTL_REG, &tmp))
+		return(0);
+
+	tmp |= DP83848_SPEED_SELECT | DP83848_AUTONEG | DP83848_DUPLEX_MODE;
+	dm644x_eth_phy_write(phy_addr, DP83848_CTL_REG, tmp);
+
+	/* Restart Auto_negotiation  */
+	tmp |= DP83848_RESTART_AUTONEG;
+	dm644x_eth_phy_write(phy_addr, DP83848_CTL_REG, tmp);
+
+	/*check AutoNegotiate complete */
+	udelay(10000);
+	if (!dm644x_eth_phy_read(phy_addr, DP83848_STAT_REG, &tmp))
+		return(0);
+
+	if (!(tmp & DP83848_AUTONEG_COMP))
+		return(0);
+
+	return (dp83848_get_link_speed(phy_addr));
+}
+
+#endif	/* CONFIG_CMD_NET */
+
+#endif	/* CONFIG_DRIVER_ETHER */